Need to up the feed?

Jmcsupplies

Jmcsupplies

Well-Known Member
Hi guys, me again!

I’ve got these cuttings in veg and one of them has shown about 3 green leaves and some of them have yellowing marks on the side bit of the leaf blade (not the tip)

im in soil and watering every 72 days now via an autopot on a timer

ph is 6.5 and ec is 1.1
Under 1000w hps
Light cycle is 24/0
Fed with growers ark nutrients
I did add a quarter of the recommended cal/mag to try and sort it but doesn’t seem to have done anything so I thought I’d come here for some expert advice

do I need to up the ec? If so, what should I be at in week 4 of veg?

thanks
 

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I,d expect a 1000w in a confined space to drive up the ec resulting in build up, when you feed/water do you have run off?
 
Star Dog said:
I,d expect a 1000w in a confined space to drive up the ec resulting in build up, when you feed/water do you have run off?
Click to expand...

i bottom feed so I don’t know, I wouldn’t say it’s a confined space, it’s 12ft x 8ft tent with 4 of the 1000w in....
 
Jmcsupplies said:
i bottom feed so I don’t know, I wouldn’t say it’s a confined space, it’s 12ft x 8ft tent with 4 of the 1000w in....
Click to expand...
No that size sounds fine, what you need to do is run nutrient through the pot so you have a good half litre run out of the bottom, then measure the ec, I'd expect it'll be high with bottom feeding, there'll be salt build.
 
I see your using auto pots, I used smart/aqua trays basically a bigger version of auto pots, I found I had to offset the nutrient by a few points so that the last of the nutrient was still within an acceptable range.
If it's not offset you can end up with nutrient that's to strong especially in hotter conditions.

Check your tray ec!
 
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